be onto somebodyinformal a) (also get onto somebody especially British EnglishBrE) to speak to someone in order to tell them or ask them something 告诉某人;向某人询问 A number of people have been onto me complaining about the noise. 一些人不断地向我抱怨噪声的事。
Get onto the Press Office and find out what’s happening. 去新闻办公室问问发生了什么事。
b) to know that a particular person did something wrong or committed a crime 发现某人做了错事,发现某人犯了罪 The police are onto him. 警察盯上他了。
be onto somebody• He's scared. He knows we're onto him.
→ be onto somebody at onto(1)